Mechanical movement



(No Model) 0. F. LUPKIN & W. GORDON. MEGHANIGAL MOVEMENT No. 579,327. Patented Mar. 23, 1897.

WITNESSES:

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rarns OHAUNOEY F. LUFKIN, OF LIMA, AND ANTHONY TV. GORDON, OF TOLEDO, OHIO.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 579,327, dated March 23, 1897. A li tio fil d January 14, 1897. $eria1N0. 619,189. (No model-) 1 It Hill/0771, it may concern:

Be it known that we, GHAUNcEv F. LUFKIN, residing at Lima, Allen county, and ANTHONY \V. GORDON, residing at Toledo,Lucas county, Ohio, citizens of the United States, have invented a certain new and useful Mechanical Movement, of which the following is a specification.

Our invention relates to and its object is to provide a device by means of which a shaft reciprocating longitudinally may be caused to rotate intermittently upon its axis a part turn when traveling in one direction and to reciprocate in the opposite direction without turning.

For illustration we have shown our invenas applicable to a gas-engine and adapted to actuate the exhaust-valve at each alternate stroke of the shaft.

\Ve attain our object by means of the device hereinafter described, and shown and illustrated in the accompanying drawings, made part hereof, in which- Figure 1 is a side elevation of our device with a journal-box and its pawls, hereinafter referred to, removed; Fig. 2, an end view of the same seen from the right in Fig. 1; Fig. 3, a sectional elevation 011 line a z, viewed. from the right in Fig. 4:; Fig. 4, a side elevation of a journal-box, hereinafter referred to; Fig. 5, a sectional elevation on line ,2 a, Fig. 4, viewed'from the left; Fig. 6, a transverse section of the sleeve shown in Fig. '7 on line a: x, viewed from the right; Fig. 7, a side elevation of the spirally-slotted sleeve, hereinafter referred to; Fig. 8, a section of the same on line y y, viewed from the left in Fig. 7; and Fig. 9, an end view of the shaft 4, in section, within the box 3.

Like numerals of reference indicate like parts throughout the several "iews.

In the drawings, 1 is a base or frame carrying two journals 2 3 in which the shaft 4 is mounted and in which said shaft reciprocates and rotates, as hereinafter described. Loose upon the shaft and fitted between the two journals is a sleeve 5, in which is formed a slot 6, extending spirally half-way around and from end to end of the sleeve. Rigidly se' cured to the shaft 4 and projecting radially therefrom through the slot 6 is a pin 7. Now if the sleeve beheld stationaryand the shaft be caused to move longitudinally the pin 7, following the spiral slot 6, will cause the shaft 4.- in making one stroke to make a half-revolution, and if the shaft be caused to move longitudinally, being held against rotation, the sleeve will be caused, by means of the slot and pin, to make a half'revolution. It will also be seen that if the sleeve and the shaft are alternately held against rotation the loose member will be caused to make a half-turn on its axis at each stroke to and fro of the shaft. -To accomplish this, journal-box 8, forming part of the journal 3, is recessed at each end, as at 9. In each of these recesses is secured a pawl 10, pressed constantly i11- wardly toward the axis of the shaft bymeans of flat spring 11. l/Vithin the journal 3 the shaft is grooved longitudinally, as at 12, and into one of these grooves at each half-turn of the shaft 4 falls one of the pawls 10, preventing rotation of the shaft, but permitting its longitudinal movement. The sleeve is pro- Vided with a head 13, socketed in a suitable recess in the end of the box, which head is notched, as at 14, and into one of these notches falls the other of said pawls at each halfrevolution of the sleeve, preventing the movement of the sleeve axially while the shaft is moving longitudinally on the reverse stroke. The connection through which a reciprocating motion is imparted to-the shaft should be loose and adapted to push and to pull the shaft, but not to interfere with its rotation axially.

The operation of our device is as follows:

Assuming that the shaft 4: is projected to theend of its outward stroke toward the right, as in Fig. 1, one of the pawls 10 falls into one of the notches 14 upon the head 13 of the sleeve 5, preventing backward rotation of the sleeve. The shaft is now pulled back on its inward stroke, the lug or pin 7 traveling in the spiral groove 6, causing the shaft while making this stroke to make a half-turn axially. The other of said pawls 10 now falls into the groove 12, holding the shaft against backward rotation. The shaft is now pushed upon its outward stroke, the lug or pin 7, traveling in the spiral groove 6', causing the sleeve to rotate a half-revolution, when it is again caught by its pawl and the operation is complete and the parts are ready for its repetition indefinitely. It should be understood that the shaft makes a half-turn on its inward stroke and the sleeve a half-turn on the outward stroke of the shaft, the sleeve and the shaft being alternately held against rotation by their respective pawls.

In the drawings, upon the outward end of the shaft is shown a lug or finger 15, located to one side of the aXis of the shaft. If a valvestem or other object be placed in the path of said lug, it will be seen that as the lug makes a half-revolution with the shaft at each for ward stroke the lug will strike the valve-stem or other object only at each alternate stroke.

It is obvious that the extent of the rotation of the shaft at each outward stroke is controlled by the lead or wind of the spiral slot 6, and that by our device the shaft may be caused to perform a complete revolution or more, or any desired part of a revolution, by a mere modification of the lead of the spiral slot 6; also, that the spiral slot serving as a guide or way may be either upon the sleeve or shaft, while upon the other member may be secured the means for engaging said spiral guide or way. It will also be clear without illustration that the rotary movement of the shaft may be obtained upon either its forward or back stroke by merely reversing the detents and the direction of the spiral guide.

Having described our invention, what we claim, and desire to secure by Letters Patent,

Means for imparting to a reciprocating shaft or rod an intermittent, rotary motion, co1nprising a sleeve, loose upon the shaft, a spiral guide or way upon one of said members, means upon the other of said members for engaging said guide or way, means for holding said sleeve against longitudinal motion, a detent for the shaft and a detent for the sleeve, adapted to prevent reverse rotation of said shaft and sleeve, substantially as and for the purpose specified.

CI'IAUNCEY F. LUFKIN. AN"HONY V. GORDON.

itnesses to signature of Chauncey F. Lufkin:

E. G. LUFKIN, R. C. WARNER.

\Vitnesses to signature of Anthony \V. Gordon:

JOHN M. ORMOND, L. E. BROWN. 

